Moved the Klipsch speakers to the floor and tilted them back 10 degrees or so (stuck pool noodles under the front bottom edge heehee). Changed to a Nakamichi 75W/chan receiver.
The Heresys will blow you out of the room at full volume. Don't know how many watts they are rated for* but they handle the 75W with aplomb. They sound a bit on the "bright" side to me but a little tweaking of the tone controls made it more pleasant to my ears (plus moving them to the floor seemed to help with bass response). My buddy doesn't have much room for two more speakers (he collects 1960-1980s audio equipment and cameras) so I have them on loan until he can find a spot.
* 100W